Door lock



Jan. 18, 1944.

W. R. SCHLAGE DOOR LOCK 2 Sheets-Sheet l Filed Ot. 26, 1942 ,mmm

,w TIM rf/fr! fifa-- Jan. 18, 1944. w. R. scHLAGE DOOR LOCK Filed Oct.26, 1942` 2 Sheets-Shft 2 ATTORN Patented Jan. 18, 1944 UNITED STATESPATENT OFFICE Y DOOR LOCK Walter R. Schlage, Burlingame, Calif'.

Application October 26, 1942, Serial No. 463,346 2 claims. (otro-15o)vThis invention relates to door locks, and especially to a door lock ofthe inter-communicating type- The object of the present invention isgenerally to improve and simplify the construction and operation of doorlocks of the character described; to provide a door lock in which thelatch bolt and the spindle whereby it is actuated may both bedead-locked against operation; to provide a door lock having a latchbolt and a tubular rotatable spindle whereby it is actuated, and amember within the spindle whereby the latch bolt may be dead-locked whenprojected and the spindle secured against rotation; and, further, toprovide either key or manually operable means which are independentlyoperable from either end of the spindle to actuate the member within thespindle so that the latch bolt may be dead-locked or released and thespindle rendered inoperative or operative either from one side oranother of a door, or both.

The door lock is shown by way of illustration in the accompanyingdrawings, in which- Fig. 1 is a vertical, longitudinal section of thedoor lock taken on line I-I of Fig. 2;

Fig. 2 is a horizontal, longitudinal section of the door lock showing itinstalled in a door;

Fig. 3 is a vertical section of the door lock taken on line III`III ofFig. 2;

Fig. 4 is a perspective view of the tubular spindle;

Fig. k5 is a perspective View of the key-actuated pin tumbler plug;

Fig. 6 is a perspective view of a link which cooperates with the plugof'Fig. 5;

Fig. 7 is a perspective View of the turn-button and the bar or linkcooperating therewith;

Fig. 8 is a perspective View of the latch bolt and retractor plate;

Fig. 9 is a perspective view of one plunger;

Fig. 10 is a perspective view of the other plunger;

Fig. l1 is a perspective View of they spindle housing and spindle withassociated mechanism assembled, and

Fig. 12 is a perspective View oi the anchor member.

-The door lock illustrated in this invention consists of two units, towit-a latch bolt unit and a latch bolt actuating unit. The latch boltunit (seeFigs. 2andv3) comprises` an elongated housing having sidewallsf3-,3, top and bottom walls 2 2, anvinner end memberor closure '4,and anouter face platev.5,.in `whiclnisA formeds a central opening toprovidea guide and support for the latch bolt 6. Suitably secured to thelatch bolt is a retractor plate, generally indicated at I (see Figs. 2and 8). This'platehas a length approximately three-fourths of the lengthof the latch bolt housing, and the inner end thereof terminates in aheadmember 8forward of which is formed a slot 9, and on the rear of which isformed a lug I0 which receives and retains a spring H whereby .the latchbolt and retractor plate are normally held ina projected position.Formed onthe head ,or secured thereto is a dead-locking .pin l2, and.formed on the head forward thereofare upper and lower shoulders lll``and l5 which are engaged by a rollback member, hereinafter to bedescribed. An anchor member, generally indicated at ,D (see Figs. 2 and12), togetherwithaspring I6, is also mounted in thelatch bolthousingandwill later be described.

The latch bolt actuating unit comprising a tu bular housing Il (seeFigs. 2 and 1l) which ,is provided for the reception of a tubularspindle I3 (see Fig. 4). This spindle has a cross slotin it, as at I9,to form a rollback member 2i). It is. otherwise cross-slotted as at 2iand 22, and longitudinally slotted as at 23. Furthermore, it has an L-shaped slot `.2li and a cam-shaped slot 25 formed therein. The spindlehousing il also has a cross slot ia which aligns with the cross slot I9of the spindle, and on opposite sides of slot Nia are formed slots 26ywhich are provided for the .purpose of receiving the inner ends 26a ofthe anchor member D, as willlater be described.

Within the tubular spindle i8 are mounted two identical plungers .27 and2S. Each has a slot formed in its outer end to receive a link or bar 2S,and each link is secured toitsplunger by a pin. The pin securing thelink and plunger 21 is shown at 3B, and the pin securing .the link tothe plunger` 28 is shown atti. Thetouter end of the link which issecured to the plunger 23 is provided with a turn-button .'ilxwh-ichprojects from the inner end of theA spindle i3, :and the link which issecured to plunger :2l extends into a slot formed at the inner endof akeyactuated pin tumbler plug 33 mountedin the outer end of the spindle.the cam slot25 formed in the spindle and pini extends into the L-shapedslot of the spindle,

and their function will hereinafter be described.

vThe door lock shown in' this-instance is installed in a doorsuch as'shown at.A'(see=Fig. 2)- by' ldrillingl or boring` twofholes. therein,'tasf'shown Pint!) extends into at B and C. 'Ihe latch bolt housingcontaining the latch bolt and cooperating mechanism is inserted in thehole B and the spindle housing l1 containing the spindle and associatedmechanism is then inserted in the hole C, and as such will extendthrough openings formed in the side walls 3-3 of the latch bolthousing.` During this insertion the latch bolt and connected retractorplate must be depressed su'ciently to cause the inner end of theretractor or lug I to engage and force the anchor member D rearwardlytoward the inner cover plate 4 of the latch bolt housing, as the spindlehousing must not only pass through the slot 9 formed in the retractorplate, but must also clear the anchor plate; thus when the spindlehousing is fully inserted and f centered so that both ends thereofproject uniformly from opposite faces of the door, the latch bolt willbe released and when released the anchor member will be forced forwardlyby its spring I6 to a position where its inner ends 25a will enter theslot 26 of the spindle housing, thereby iinally centering the spindlehousing and, at the same time, securing it against lateral or endwiseremoval. The head 8 of the retractor plate will at the same time enterslots i9 and I9a of the spindle housing and spindle, and as such will bebrought into engagement with the rollback member 2U of the spindle. Whenthis position is reached, the latch bolt will be fully projected and pinI2 carried by the retractor plate will align with the plungers 21 and 2B(see Fig. 2).

To complete installation of the lock, a pair of escutcheon plates 38areapplied to opposite ends of the spindle housing, this housing beingthreaded at each end to receive the escutcheon plates. When they arescrewed up on the ends of the spindle housing into snug engagement withOpposits faces of the door, the entire mechanism will be rigidlysupported and secured. Thereafter the outer knob 39 may be applied andthen the inner knob 40, both knobs being suitably secured when appliedas, for instance, by latches 4I which project through the cross slots 2land 22 of the spindle.

In actual operation it willbe understood that this lock is particularlydesigned for installation in inter-communicating doors. If a person inone room desires to dead lock the latch bolt against operation so thatthe door may not be opened by a person in the adjoining room, the rstperson will, for instance, grasp the turn-button 32 and first push itinwardly and then give it a quarter turn so that pin 3l will enter thelateral portion of the L-shaped slot 24. In so doing, the plunger 28 ispushed inwardly, and as the inner end of the plunger telescopes over thepin I2, latch bolt 6 will be dead-locked and the spindle I8 will at thesame time be dead-locked or secured against rotation as the rollbackmember will engage the shoulders I4 and I5 of the head of the retractorplate and as such cannot be rotated.

The plunger 2'I is key-operated. By inserting a key in the plug 33, thepin or plate tumblers 42 carried thereby will be retracted from the slot23 of the spindle, and the plug may then be rotated by means of the key.Such rotation is transmitted to the link or bar Za which is connectedwith the plunger 2l, and when the bar and plunger are rotated pin 3Uwill also rotate in unison therewith.V AsV the pin projectsv into thecam-shaped slot 25 the plunger and bar will move inwardly and cause theinner end of the plunger to telescope over the pin I2, thus 'againdead-locking the latch bolt and, at the same time, dead-locking orsecuring the spindle against operation.

In View of the foregoing, it is apparent that the latch bolt may bedead-locked from either or both sides of a door, and similarly that thespindle may be dead-locked or secured against rotation from either orboth sides of a door. A manual means, such as the turn-button 32, may beplaced on opposite ends of the spindle, or key means may be placed onopposite ends of the spindle, or manual means may be placed on one endand key-actuated means on the opposite end, as shown in Fig. 2. Themechanism actuated either by the key or the turn-button is exceedinglysimple, as al1 that is required is a plunger which moves longitudinallyWithin the spindle and such movement may be imparted either by camaction and rotation, by the key mechanism, or by a straight push actionas with the button 32. The pins 30 and 3l cannot be lost as they are atall times within the spindle housing. Furthermore, the pins 30 and 3land al1 other mechanism are completely concealed. In Fig. 2 the plungersare shown in projected or released position. In this position thespindle may be rotated by either knob, but when either of the plungersis depressed or moved inwardly the latch bolt immediately becomesdead-locked and the spindle secured against rotation. Hence the doorcannot be opened from either side except by manipulation of the keymechanism or manual operation of the button 32, and both plungers mustbe released before the spindle is again free for rotation.

It will, of course, be understood that various changes may be made inthe form, details, arrangement and proportions of the several partswithout departing from the scope of my invention.

Having thus described and illustrated my invention, what I claim anddesire to secure by Letters Patent is:

l. In a door lock, a latch bolt, an elongated plate-like member securedto the latch bolt and forming a retractor plate, a tubular spindlehaving a rollback member engageable with the retractor plate to retractthe latch bolt, a deadlocking pin secured on the retractor platenormally aligning with a central longitudinal axis of the spindle, aplunger in the spindle having one end adapted to telescope over thedeadlocking pin and thereby deadlock the latch bolt and at the same timesecure the spindle against rotation, a slot formed in the opposite endof the plunger, a link bar having one end extending into said slot, anL-shaped slot formed in the spindle, a pin in the plunger extendingthrough the link bar and into the L-shaped slot, and a button extendingfrom one end of the spindle and secured to the opposite end of the linkbar, said button when grasped and pushed inwardly causing the plunger totelescope over the deadlocking pin and said button when partiallyrotated after it has been pushed inwardly causing the pin which extendsinto the L-shaped slot to enter the lateral portion thereof and therebysecure the plunger in deadlocking position.

2. In a door lock, a latch bolt housing, a platelike elongated memberslidably mounted in the housing forming a retractor plate, a latch boltsecured to the retractor plate, a tubular spindle housing extendingthrough the latch bolt housing, an elongated slot formed in theretractor plate, a single tubular spindle extending through and disposedone on each side of the retractor plate, each plunger having a recessformed therein to permit each plunger to telescope over the deadlockin-gpin, and means for moving the plungers independently of each other intoor out of .5 telescoping engagement with the deadlocking pin.

WALTER R. SCHLAGE.

